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Annual report of the Board of Regents of the Smithsonian Institution

其他書名	showing the operation, expenditures, and conditions of the institution : for the year ended .... 1858 (1859)
出版	U.S. Government Printing Office, 1859
URL	http://books.google.com.hk/books?id=QXdJAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋"Report of recent progress in physics", by Dr. Joh. Müller, University of Freiburg, translated from the German and with additions by George C. Schaeffer. Discusses (p. 392-407) the history of electrotype including electro-etching of daguerreotypes, particularly the use of electrotypes by Harper's magazine for whole issues by 1854, and mentions that Fizeau plates would bear only 30 to 40 impressions.---Hanson Collection Catalog, p. 21.